After taking some suggestions in consideration this is the finished updated the site, seapip.comIt uses :target anchors now for the tabs ^^Quite soem emssing around to get .htacces working correctly and I had to use a little little bit of js to add a #about hash to the index page, if someone knows a non js way let me know ^^

It's work in progress and only consists of 1 index file like my previous website ^^But it's totally written in html5 and css3 now and doesn't contain 1 line of js, I used checboxes and radioboxes instead xD

I would like to hear any opinions about it if possible, and ignore the empty content, currently there are only placeholders.

If it doesn't work in your browser it might be my lazy unfinished codin, try firefox for now Fixed Chrome, Safari & IE9-IE10. (Just tested in Chrome for android and it works flawless with 3d animations O.o)IE8-IE9 & Opera will be using fallback page.

Text is hard to read.
Also I find it a bit small, why not make the whole container a bit bigger? Make it responsive and get smaller for smaller screens. I have a large resolution and its like a little tiny box in the middle xD
Apart from those two things I love it. Very nice and clean

EDIT: The contact page breaks up the flow. When it flips round its a bit awkward to get back. Maybe a bigger X and putting the nav menu in that page too would help.
Also dont like how the contact page is even smaller.

Seems nice, a little plain but plain is good too.
Although the Contacts page does do the spin animation, I see a narrower white box but no text there,
although something does seem to be there when I mouse over areas, I just don't see anything.
I'm using IE 10 on Windows 7.

Personally i don't like it, the theme you have selected is too white and i find it difficult to read, i have to strain my eyes to make out some of the text, maybe if you mixed it up a little bit and added some pastel colours to break the page up a little bit and add some background to the text to make it easier to read?

I like the contact form, that is a nice touch, seems to work well in Firefox on Windows.